Finding the Fourth Proportional to 1,581.31, 2,370.14 and 850.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,581.31 : 2,370.14 = 850.69 : x
2. Step 2: Convert to fraction form
   1,581.31/2,370.14 = 850.69/x
3. Step 3: Cross multiply
   1,581.31x = 2,370.14 × 850.69
4. Step 4: Simplify right side
   1,581.31x = 2,016,254.40
5. Step 5: Solve for x
   x = 2,016,254.40/1,581.31
6. Step 6: Final answer
   x = 1,275.05